<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片区域 -->
    <el-card>
      <el-alert title="添加商品信息" type="info" show-icon></el-alert>
      <!-- 步骤条 -->
      <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!-- tabs标签页(tab栏) -->
      <!-- form表单 -->
      <el-form
        :model="addForm"
        :rules="addinggoodsFormRules"
        ref="addFormRef"
        label-width="80px"
        label-position="top"
      >
        <el-tabs v-model="activeIndex" :tab-position="'left'" :before-leave="beforeTabLeave" @tab-click="tabClicked">
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <!-- 级联选择 -->
            <el-form-item label="商品分类" prop="goods_cat">
                <el-cascader
                    :props="cateProps"
                    v-model="addForm.goods_cat"
                    :options="catelist"
                    @change="handleChange">
                </el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <!-- 渲染表单的item项 -->
            <el-form-item :key="item.attr_id" :label="item.attr_name" v-for="item in manylableData">
              <!-- 复选框 -->
                 <el-checkbox-group v-model="item.attr_vals">
                    <el-checkbox border :key="i" :label="cs" v-for="(cs,i) in item.attr_vals"></el-checkbox>
                  </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
             <!-- 渲染表单的item项 -->
            <el-form-item :key="item.attr_id" :label="item.attr_name" v-for="item in onlylableData">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!-- action 表示图片要上传到的后台apl地址 -->
            <el-upload
              :action="uploadURL"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headerObj"
              :on-success="handleSuccess">
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本编辑器组件 -->
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <!-- 添加商品的按钮 -->
             <el-button type="primary" @click="showAdd">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!-- 图片预览 -->
    <el-dialog
  title="图片预览"
  :visible.sync="previewVisible" width="50%">
  <img :src="preview" alt="">
</el-dialog>
  </div>
</template>

<script>

import _ from 'lodash'

export default {
  data() {
    return {
      activeIndex: '0',
      // 添加商品的验证规则对象
      addinggoodsFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_cat: [
          { required: true, message: '请输入商品分类', trigger: 'blur' }
        ]
      },
      //   添加商品的表单数据对象
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        // 商品所属的分类数组
        goods_cat:[],
        // 图片信息数组
        pics:[],
        // 商品详情
        goods_introduce:'',
        attrs:[]
      },
      //   商品分类列表
      catelist: [],
      cateProps: {
          label:'cat_name',
          value:'cat_id',
          children: 'children'
      },
      // 动态参数列表数据
      manylableData:[],
      // 静态属性列表数据
      onlylableData:[],
      // 上传图片的url地址
      uploadURL:'http://www.klxin.cn:8888/api/private/v1/upload',
      // 图片上传组件的headers请求头对象
      headerObj:{
        Authorization: window.sessionStorage.getItem('token')
      },
      // 图片路径
      preview:'',
      // 图片回话框的显示与隐藏
      previewVisible: false
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    async getCateList() {
      //    获取所有商品分类数据
      const { data: res } = await this.$http.get('categories')
    //   console.log(res)
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品列表失败!')
      }
      this.catelist = res.data
      // console.log(this.catelist);
      
    },
    // 级联选择器发生变化触发
    handleChange () {
        // console.log(this.addForm.goods_cat);
        if (this.addForm.goods_cat.length !==3) {
          return this.addForm.goods_cat = []
        }
        
    },
    // 
    beforeTabLeave (activeName,oldActiveName) {
      // console.log('即将离开的标签页名字是' + oldActiveName)
      // console.log('即将进入的标签页名字是' + activeName)
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请选择商品分类')
        return false
      }
    },
   async tabClicked () {
      // console.log(this.activeIndex);
      // 访问的动态参数面板
      if (this.activeIndex === '1') {
      const {data: res} = await this.$http.get(`categories/${this.cateId}/attributes`,{
          params: {sel: 'many'}
        })
        // console.log(res);
        if (res.meta.status !== 200) {
          return this.$message.error('获取参数失败!')
        }
        res.data.forEach(item => {
        item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        this.manylableData = res.data
        // console.log(this.manylableData);

      }else if (this.activeIndex === '2') {
        // 访问的商品属性
        //  console.log(123);
         const {data: res} = await this.$http.get(`categories/${this.cateId}/attributes`,{
          params: {sel: 'only'}
        })
        // console.log(res);
        if (res.meta.status !== 200) {
          return this.$message.error('获取参数失败!')
        }

        res.data.forEach(item => {
        item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        this.onlylableData = res.data
        // console.log(this.onlylableData);
         
      }
    },
    // 处理图片预览效果
    handlePreview (file) { 
      // console.log(file);
      this.preview = file.response.data.url
      // console.log(this.preview);
      
      this.previewVisible = true
    },
    // 处理移除图片操作
    handleRemove (file) {
      // console.log(file);
      // 获取要删除图片的临时路径
      const filepath = file.response.data.tmp_path
      // 从pics数组中找到这个图片对应的索引值
      const i = this.addForm.pics.findIndex(x => x.pic === filepath)
      // console.log(i);
      
      // 调用数组的splice方法删除
      this.addForm.pics.splice(i,1)
      // console.log(this.addForm);
      
    },
    // 监听图片上传成功的事件
    handleSuccess (response) {
      // console.log(response)
      // 得到一个图片信息对象
      const picInfo = { pic:
      response.data.tmp_path}
      // 将图片信息对象push到pics数组中
      this.addForm.pics.push(picInfo)
      // console.log(this.addForm);
      
    },
    // 点击添加商品按钮
    showAdd () {
      // console.log(this.addForm);
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) {
          return this.$message.error('请填写必要的表单项!')
        }
        // loadsh cloneDeep 复制
      const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        // 处理动态参数
        this.manylableData.forEach(item => {
          const newInfo = {attr_id: item.attr_id,
          attr_value: item.attr_vals.join(' ')
        }
          this.addForm.attrs.push(newInfo)
        })
        // 处理静态属性
        this.onlylableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals
        }
          this.addForm.attrs.push(newInfo)
        })
        form.attrs = this.addForm.attrs
        // console.log(form);
        
        // 执行添加的业务逻辑
        const {data: res} = await this.$http.post('goods',form)
        if (res.meta.status !== 201) {
          // console.log(res.data)
          
          return this.$message.error('添加商品失败!')
        }
        // console.log(res);
        this.$message.success('添加商品成功!')
        this.$router.push('/goods')
      })
    }
  },
  // 三级分类的id
  computed: {
    cateId () {
    if (this.addForm.goods_cat.length === 3) {
         return this.addForm.goods_cat[2]
      }
      return null
    }
 },
}
</script>,


<style lang="less" scoped>
.el-steps {
  font-size: 12px;
  margin: 10px 0;
}
.el-checkbox {
  margin:0 10px 0 0 !important;
}
.el-button {
  margin-top: 15px;
}
</style>